(2yx³-3x²y+4xy³)÷(-2x)÷(-y)
已知x-y=4xy,则2x+3xy-2yx-2xy-y
3xy+xy+2x²y+yx²+3x²y等于多少
已知x²y²-8xy+4x²+y²+4=0,求y-2x+(yx/2)的2013次
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
(xy³/z)²×(-xz/y)³÷(-yx/x)四次方
已知:y=1−8x+8x−1+12,则代数式xy+yx+2-xy+yx−2的值为( )
已知1x-1y=3,则分式2x+3xy-2yx-2xy-y的值为( )
[x(x²y²-xy)-y(x²-x³y)]÷3x²y
因式分解:[x(x²y²-xy)-y(x²-x³y)]÷3x²y
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
(x³-2xy²)dy+(2y³-3yx²)dx=0求通解